[Serusers] 500 server errror (1/SL) from ser while INVITE

[jimmy huang]

Hi,
I am trying to build SER 0.8.14 in my office
everything is ok, but after 2 weeks more, SER became strange
all clients can register to SER, but when INVITE, SER will reply 

500 I'm terribly sorry, server error occured (1/SL) 

and in syslog,
Oct 12 16:00:32 localhost daemon.err /sbin/ser[1073]: ERROR: sip_msg_cloner: cannot allocate memory 
Oct 12 16:00:32 localhost daemon.err /sbin/ser[1073]: ERROR: new_t: out of mem: 
Oct 12 16:00:32 localhost daemon.err /sbin/ser[1073]: ERROR: t_newtran: new_t failed 
Oct 12 16:00:32 localhost daemon.err /sbin/ser[1073]: ERROR: sl_reply_error used: I'm terribly sorry, server error occured (1/SL) 

Is some function in SER need locate large memory , and cause the lack of memory ?
but i check the system memory via command free, it still has about 5 mb...

have any ideas???

Thanks and regards 
Jimmy

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